Grams, Moles and Atoms

How many molecules of AlCl₃ are in 9.44 moles of AlCl₃?

• 5.68 molecules

• 5.68x10²⁴ molecules

• 0.705 molecules

• 1.25x10²³ molecules

How many grams are in 11.9 moles of chromium?

• 0.229g

• 4.37g

• 52.0g

• 619g

How many moles are in 15.0 g of lithium?

• 104 mol

• 2.16 mol

• 6.94 mol

• 15.0 mol

Find the molar mass of:
Pb(NO₃)₂ 

• 241 g/mol
• 207 g/mol
• 301 g/mol
• 331 g/mol

How many moles are in 9.8 grams of calcium?

• 0.24 moles

• 4.1 moles

• 1.0 mole

• 390 moles

How many molecules are there in 5.9 moles of NaCl?

• 3.5x10²⁴ molecules

• 9.80x10^-24 molecules

• 1.02x10²³ molecules

• 6.02x10²³ molecules

How many moles are present in 32.3 grams of carbon dioxide (CO₂)?

• 44.0 moles

• 1420 moles

• 32.3 moles

• 0.734 moles

Tags

NGSS.HS-PS1-7

How many molecules are in 150.0g if Na₂SO₄?

• 9.03x10²⁵ molecules

• 1.056 molecules

• 6.357x10²³ molecules

• 5.701x10²³ molecules

Tags

NGSS.HS-PS1-7

You have two sealed flasks. The first flask contains 22.99 grams of solid sodium (Na). The second flask contains 200.59 grams of liquid mercury (Hg). Which flask has more moles of the indicated substance?

• The first flask

• The second flask

• Neither.

You have 2 moles of graphite (KC₈) in your pencil. How many grams of graphite are in your pencil?

• 135.19 g

• 270.37 g

• 67.59 g

• 134 g

Tags

NGSS.HS-PS1-7